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SubjectRe: [PATCH v3 01/28] IB/Verbs: Implement new callback query_transport()
On 4/13/2015 8:22 AM, Michael Wang wrote:
> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
> index 65994a1..d54f91e 100644
> --- a/include/rdma/ib_verbs.h
> +++ b/include/rdma/ib_verbs.h
> @@ -75,10 +75,13 @@ enum rdma_node_type {
> };
>
> enum rdma_transport_type {
> + /* legacy for users */
> RDMA_TRANSPORT_IB,
> RDMA_TRANSPORT_IWARP,
> RDMA_TRANSPORT_USNIC,
> - RDMA_TRANSPORT_USNIC_UDP
> + RDMA_TRANSPORT_USNIC_UDP,
> + /* new transport */
> + RDMA_TRANSPORT_IBOE,
> };
>
> __attribute_const__ enum rdma_transport_type
> @@ -1501,6 +1504,8 @@ struct ib_device {
> int (*query_port)(struct ib_device *device,
> u8 port_num,
> struct ib_port_attr *port_attr);
> + enum rdma_transport_type (*query_transport)(struct ib_device *device,
> + u8 port_num);
> enum rdma_link_layer (*get_link_layer)(struct ib_device *device,
> u8 port_num);
> int (*query_gid)(struct ib_device *device,

libibverbs also exposes transport at the device level. Isn't a change to
make transport per port rather than per device needed there as well to
be consistent with these proposed kernel changes ? If so, would the
additional IBoE transport be exposed ? We also need to worry about
backward compatibility for existing applications.

-- Hal


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